Improved rock-drill



PATENT 01ml;i f.

OWEN G. WARREN, OF NEW YORK, N. Y.

IMPROVED ROCK-DRILL.

Specification forming part of Letters Patent No. 54,982, dated May 22,1866.

To all whom 'it may concern:

Beit known that I, OWEN G. WARREN, of the city, county, and State of NewYork, have invented a new and useful Improvement in Rock-Boring Drillsand I hereby declare th at the following is a full and exact descriptionthereof.

To enable others skilled in the business to make and' use my invention,I proceed to describe its construction and operation, reference beinghad to the drawings hereunto annexed, and making part of thisspecification.

Figure l, part ot' the pipe with the collar and the chiselstock andchisels; Fig. 2, section, the pipe and collar; Fig. 3, upper end ol' thechisel-stock; Fig. 4, side of the same; Fig. 5, lower end of -the same;Fig. 6, one ot' the picks; Figs. 7 and 8, chisels; Fig. 9, diagramexhibiting the upper part of the pipe in section, with the collarweightand outletpipe.

The same letters refer to the same things in all the designs.

A, the pipe or boring-shaft; B, the collar which holds thefchisel-stock;(Il, the chiselstock; D, the ehisels; E, the picks; F, bore of the pipeG, vulve-opening in the top of C; H, holes or sockets for chisels orpicks; I, inlet-holes by which the water, Ste., is admitted into thepipe and drawn out; J, pin-holes to secure in the ehisels, Ste.; K,thepins or screws to secure the chisels, Ste. L, the valve; M, thecollar-weight, drawing reduced; N, the outlet hose or pipe; O, thejunction-collars by which the pipe is lengthened.

I use iron pipe for the shaft of the drill,

uniting it by a collar at each length, as gas pipes are united. For awell whose supposed depth will be less than two hundred feet I wouldmake it one inch and a half in diameter, and the thicknessofmetalaquarterinch,though it would stand if but oneeighth of an inch,with a light weight upon it. The thickness of the collar should be aquarter inch, so that a strong screw can be made in it. It should be sixinches long.

When the joint is made the two lengths of pipe should abut togetherfirmly by a true fit, so as to resist the shock and not Wear the screw.When screwed together the joint should be also keyed for additionalsafety. At the foot of the pipe it fits strongly and securely upon achisel-stock. This is made to receive in its sockets or holes three orvmore ehisels. Seven is a good number, since the greater the number thesharper they may be made. Picks or points may be mixed with themsometimes with advantage. In certain kinds of rock and in all earth apointed piece may be rammed through, packing the earth at the sides.

rIhis stock should b e of steel and made to hold securely the chiscls.There should be several holes to admit the water and the dbris of thecutting up into the pipe, and at the top of the stock, inside the pipe,there should be a Valve to hold Whatever rises.

The chisel may be of any shape and sit at any angle. The cutting-edgemay be in theline ot' its center or at one side of the center. Theyshould altogether cut a hole for this size of pipe of two and one-fourthinches.

At the top of the pipe there should be a collar weight to slip on andclamp fast, and it should weigh from a hundred pounds to a ton,according to the size of the bore and to the power to operate the drill.

This drill, if loaded, needs but a small lift. It will do with a fewinches. The collar-weight also prevents the drill falling through.

Successive pipes, one within another, may well be used for very deepwells to give strength.

What l claim as my invention, and desire to secure by Letters Patent,is-

Loadiug the shaft with the collar-weightto i render unnecessary a highlift and for rapid boring.

OWEN G. WARREN.

Witnesses: J. D. STURTEVANT,

ALBERT JOHNSON, VALoRUs DREW.

